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save stderr only to a file

Terminal - save stderr only to a file
command 3>&1 1>&2 2>&3 | tee -a file
2012-10-30 15:40:08
User: netkill
Functions: command tee
0
save stderr only to a file

Appends output to the file, some systems require the -a to do this.

Alternatives

There are 6 alternatives - vote for the best!

Terminal - Alternatives
command 3>&1 1>&2 2>&3 | tee file
2012-10-30 10:53:21
User: hute37
Functions: command tee
1

taken from

http://www.unix.com/shell-programming-scripting/158311-how-tee-stderr.html

"

What does it mean?

The redirection operator n>&m makes file descriptor n to be a copy of file descriptor m. So, whe are:

- Opening a new file descriptor, 3, that is a copy of file descriptor 1, the standard output;

- Making file descriptor 1 a copy of file descriptor 2, the standard error output;

- Making file descriptor 2 to be a copy of file descriptor 3 (the "backup" of the standard output)

in a short: we swapped the standard output and the standard error output.

"

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